/**
 * UGENE - Integrated Bioinformatics Tools.
 * Copyright (C) 2008-2020 UniPro <ugene@unipro.ru>
 * http://ugene.net
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 */

#ifndef _U2_MDI_MANAGER_IMPL_H_
#define _U2_MDI_MANAGER_IMPL_H_

#include <QEvent>
#include <QMdiArea>
#include <QMdiSubWindow>
#include <QSignalMapper>

#include "MainWindowImpl.h"

namespace U2 {

class MDIItem : QWidget {
    Q_OBJECT
public:
    MDIItem(MWMDIWindow *_w, QMdiSubWindow *_qw)
        : w(_w), qw(_qw) {
        this->setObjectName(_w->objectName() + "_MDIItem");
        qw->setObjectName(_w->objectName() + "_SubWindow");
    }

    MWMDIWindow *w;
    QMdiSubWindow *qw;
};

typedef QList<MDIItem *> MDIItems;

class MWMDIManagerImpl : public MWMDIManager {
    Q_OBJECT
public:
    MWMDIManagerImpl(MainWindow *_mw, FixedMdiArea *_mdiArea)
        : MWMDIManager(_mw), mw(_mw), mdiArea(_mdiArea) {
        prepareGUI();
    }

    ~MWMDIManagerImpl();

    virtual void addMDIWindow(MWMDIWindow *w);

    virtual bool closeMDIWindow(MWMDIWindow *w);

    virtual QList<MWMDIWindow *> getWindows() const;

    virtual MWMDIWindow *getWindowById(int id) const;

    virtual void activateWindow(MWMDIWindow *w);

    virtual MWMDIWindow *getActiveWindow() const;

protected:
    bool eventFilter(QObject *obj, QEvent *event);

private slots:
    void sl_setActiveSubWindow(QWidget *);
    void sl_updateWindowMenu();
    void sl_onSubWindowActivated(QMdiSubWindow *);
    void sl_updateWindowLayout();
    void sl_setWindowLayoutToMultiDoc();
    void sl_setWindowLayoutToTabbed();

private:
    MDIItem *getMDIItem(int id) const;
    MDIItem *getMDIItem(MWMDIWindow *w) const;
    MDIItem *getMDIItem(QMdiSubWindow *qw) const;

    void clearMDIContent(bool addCloseAction);
    void prepareGUI();

    void updateActions();
    void updateState();

    MDIItem *getCurrentMDIItem() const;

    void onWindowsSwitched(QMdiSubWindow *deactivated, MWMDIWindow *activated);

    MainWindow *mw;
    FixedMdiArea *mdiArea;
    MDIItems items;

    QAction *closeAct;
    QAction *closeAllAct;
    QAction *tileAct;
    QAction *cascadeAct;
    QAction *nextAct;
    QAction *previousAct;
    QAction *separatorAct;
    QMenu *windowLayout;
    QAction *multipleDocsAct;
    QAction *tabbedDocsAct;

    QSignalMapper *windowMapper;
    bool defaultIsMaximized;
    MDIItem *mdiContentOwner;
};

}    // namespace U2

#endif
